Most of these plants are highly beneficial for birds and insects (aka, pollinators) and some, like Fleabane, help prevent soil erosion, which is why you'll find gardeners purposely introducing these "weeds" into their landscaping.

Wildflower blooms also make an unconventional — and free — choice for bouquets (when snipped from public spaces), which is not only friendly on the wallet but good for the planet too.

Just a few of the wildflowers we've come across walking through the city: